Visual NUnit – for running and debugging tests inside Visual Studio 2010 http://www.bubblecloud.org/visualnunit (if you have a productivity tool installed, such as Telerik JustCode or JetBrains Resharper, you can use that to run tests)

PartCover – for test coverage (will detail setting up this tool in a later blog post)

The NUnit GUI & console test runner come in two flavors – AnyCPU and x86. In my project I could only run the tests using the x86 runners (I have mixed projects – some using the x86 configuration, while most are built using the Any CPU configuration).